on server side logs show:
ORA-03137: malformed TTC packet from client rejected: [3146] [94] [] [] [] [] [] []

on client/sijms side the error shows as:
row iteration error: ORA-03146: invalid buffer length for TTC field

Happens for different queries with different bind variables at different times.

Using v2.9.0.

Server side environment: Oracle 19.27 on Red Hat Enterprise Linux Server release 7.9 (Maipo)

ADD:
The app was initially setup to open and close a connection to the db for each query.
When switching to reusing the connections as a pool the errors started occuring.